Akka HTTP 10.1.x before 10.1.15 and 10.2.x before 10.2.7 can encounter stack exhaustion while parsing HTTP headers, which allows a remote attacker to conduct a Denial of Service attack by sending a User-Agent header with deeply nested comments.
Weakness
The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Http_server | Akka | 10.1.0 (including) | 10.1.15 (excluding) |
| Http_server | Akka | 10.2.0 (including) | 10.2.7 (excluding) |
Potential Mitigations
Related Attack Patterns
References
- http://packetstormsecurity.com/files/167018/Akka-HTTP-10.1.14-Denial-Of-Service.html
- https://akka.io/blog/
- https://akka.io/blog/news/2021/11/02/akka-http-10.2.7-released
- https://akka.io/blog/news/2021/11/22/akka-http-10.1.15-released
- https://doc.akka.io/docs/akka-http/current/security/2021-CVE-2021-42697-stack-overflow-parsing-user-agent.html
- http://packetstormsecurity.com/files/167018/Akka-HTTP-10.1.14-Denial-Of-Service.html
- https://akka.io/blog/
- https://akka.io/blog/news/2021/11/02/akka-http-10.2.7-released
- https://akka.io/blog/news/2021/11/22/akka-http-10.1.15-released
- https://doc.akka.io/docs/akka-http/current/security/2021-CVE-2021-42697-stack-overflow-parsing-user-agent.html